CN105207281A - Battery charging method and device - Google Patents
Battery charging method and device Download PDFInfo
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- CN105207281A CN105207281A CN201410298572.2A CN201410298572A CN105207281A CN 105207281 A CN105207281 A CN 105207281A CN 201410298572 A CN201410298572 A CN 201410298572A CN 105207281 A CN105207281 A CN 105207281A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 20
- 229910052744 lithium Inorganic materials 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery charging method. The method includes the following steps that: the current temperature of a battery and the electric quantity percentage of the battery are obtained; a battery characteristic relationship table which is established in advance in queried according to the current temperature of the battery and the electric quantity percentage of the battery, so that the inner resistance of the battery corresponding to the current temperature and electric quantity percentage of the battery can be obtained; the charging cut-off voltage of the battery is obtained through calculation according to the inner resistance of the battery, charging current and preset charging limiting voltage and based on preset calculation rules; the battery is charged according to the charging cut-off voltage; and when the electric quantity percentage of the battery changes in a preset time period, the charging cut-off voltage of the battery is re-calculated according to the above steps, and the battery is charged according to the re-calculated charging cut-off voltage. The invention also discloses a battery charging device. With the battery charging method and device of the invention adopted, with the safety of the battery ensured, the charging speed of the battery can be improved, and the available capacity of the battery can be improved.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a battery charging method and apparatus.
Background
At present, among various batteries, lithium batteries have the advantages of high voltage platform, high energy density, long service life, environmental protection, no memory effect and the like, so that more and more mobile terminals adopt the lithium batteries as rechargeable batteries. However, due to the limitations of some characteristics of the lithium battery, when a user uses the lithium battery, the requirement on the charging method is strict, and the user needs to make a reasonable charging method according to the characteristics of the lithium battery, so as to fully exert the advantages of the lithium battery and ensure the service life of the lithium battery.
The lithium battery can be equivalent to an ideal voltage source and a resistance variable resistor, wherein the resistance is the internal resistance of the battery, when the battery is charged, the voltage of the battery is equal to the voltage of the voltage source plus the voltage of the internal resistance, and when the battery is discharged, the voltage of the battery is equal to the voltage of the voltage source minus the voltage of the internal resistance. The internal resistance of the battery is related to the temperature of the battery and the percentage of the battery capacity (namely, the residual capacity of the battery), and the internal resistance of the battery is increased sharply along with the reduction of the temperature; also, the less the percentage of charge of the battery (the less the remaining charge of the battery), the greater its internal resistance. However, in the prior art, when a lithium battery of a mobile terminal is charged, the problem of voltage division of the lithium battery by internal resistance of the lithium battery is not generally considered, that is, in the prior art, the lithium battery is generally charged according to a rated charging limit voltage marked on a battery shell, so that the charging speed is slow, and the capacity of the battery is not fully utilized.
Disclosure of Invention
The invention mainly aims to improve the charging speed of the battery and the usable capacity of the battery on the premise of ensuring the safety of the battery.
In order to achieve the above object, the present invention provides a battery charging method, including the steps of:
acquiring the current temperature of a battery and the electric quantity percentage of the battery;
inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery;
calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule;
charging the battery according to the charging cutoff voltage;
and when the electric quantity percentage of the battery is changed in a preset time period, turning to the previous step.
Preferably, the step of obtaining the current temperature of the battery and the percentage of charge of the battery further comprises:
measuring the internal resistance of the battery at different temperatures and different electric quantity percentages, and establishing a battery characteristic relation table of the battery temperature, the battery electric quantity percentage and the battery internal resistance according to the measurement result.
Preferably, the step of charging the battery according to the charge cutoff voltage further includes:
and when the electric quantity percentage of the battery is not changed within a preset time period and the charging current of the battery is lower than a preset charging cutoff current, finishing charging.
Preferably, the step of calculating the charge cut-off voltage of the battery according to the internal resistance of the battery, the charging current, and the preset charge limiting voltage according to a preset calculation rule specifically includes:
according to the internal resistance, the charging current and the preset charging limiting voltage of the battery, according to a calculation rule: v1＝V0+I×RbatCalculating to obtain the charge cut-off voltage of the battery; wherein, V1For the charging to cut off to voltage, V0Is the preset charging limit voltage, I is the charging current, RbatIs the internal resistance.
Preferably, the battery is a lithium battery.
In addition, in order to achieve the above object, the present invention further provides a battery charging device, which includes a temperature obtaining module, an electric quantity obtaining module, an internal resistance obtaining module, a charging cutoff voltage calculating module, a charging module, and an electric quantity judging module; wherein,
the temperature acquisition module is used for acquiring the current temperature of the battery;
the electric quantity obtaining module is used for obtaining the electric quantity percentage of the battery;
the internal resistance acquisition module is used for inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to acquire the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery;
the charging cut-off voltage calculation module is used for calculating and obtaining the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and the preset calculation rule;
the charging module is used for charging the battery according to the charging cut-off voltage;
and the electric quantity judging module is used for judging whether the electric quantity percentage of the battery changes within a preset time period.
Preferably, the battery charging device further comprises a relation table establishing module; and the relation table establishing module is used for measuring the internal resistance of the battery at different temperatures and different electric quantity percentages and establishing a battery characteristic relation table of the battery temperature, the battery electric quantity percentage and the battery internal resistance according to the measurement result.
Preferably, the battery charging device further comprises a current detection module and a current judgment module; wherein,
the current detection module is used for detecting the charging current of the battery;
and the current judgment module is used for judging whether the charging current of the battery is lower than a preset charging cutoff current.
Preferably, the charging cutoff voltage calculation module is specifically configured to:
according to the internal resistance, the charging current and the preset charging limiting voltage of the battery, according to a calculation rule: v1＝V0+I×RbatCalculating to obtain the charge cut-off voltage of the battery;
wherein, V1For the charging to cut off to voltage, V0Is the preset charging limit voltage, I is the charging current, RbatIs the internal resistance.
Preferably, the battery is a lithium battery.
The invention relates to a battery charging method, which comprises the following steps of firstly, obtaining the current temperature of a battery and the electric quantity percentage of the battery; then, according to the current temperature of the battery and the electric quantity percentage of the battery, inquiring a pre-established battery characteristic relation table to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery; then, calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule; then, charging the battery according to the charge cutoff voltage; and finally, when the electric quantity percentage of the battery changes within a preset time period, re-acquiring the current temperature of the battery, the electric quantity percentage of the battery and the internal resistance of the battery according to the steps, re-calculating the charging cut-off voltage of the battery, and then charging the battery according to the re-calculated charging cut-off voltage. The invention can improve the charging speed of the battery and can also improve the usable capacity of the battery on the premise of ensuring the safety of the battery.
Drawings
FIG. 1 is a schematic flow chart illustrating a battery charging method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a battery charging method according to another embodiment of the present invention;
FIG. 3 is a block diagram of a battery charging apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of another embodiment of the battery charging apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the specific embodiments in the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a battery charging method.
Referring to fig. 1, fig. 1 is a schematic flow chart of a battery charging method according to an embodiment of the present invention.
In this embodiment, the battery charging method includes the steps of:
step S01: acquiring the current temperature of a battery and the electric quantity percentage of the battery;
specifically, the method for charging a battery according to this embodiment first obtains the current temperature of the battery and the percentage of charge of the battery. The method for acquiring the current temperature of the battery specifically comprises the following steps: inputting a specified current I to an NTC thermistor (negative temperature coefficient) of the batteryntcThen, the voltage U across the NTC thermistor is measuredntcWill measure the voltage UntcDivided by the input specified current IntcObtaining the resistance value R of the NTC thermistorntcI.e. Rntc＝Untc/IntcFinally, by inquiring the resistance R of the NTC thermistorntcA correspondence table with temperature (the correspondence table is made by a manufacturer of the NTC thermistor),obtaining a current temperature of the battery;
and the percentage charge of the battery (also referred to as the SOC, StateOfCharge, state of charge) ranges from 0 to 100. When the SOC value of the battery is 0, the available electric quantity of the battery is zero; when the SOC of the battery has a value of 100, it represents that the battery is fully charged. In this embodiment, the battery is a lithium battery.
Step S02: inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery;
specifically, in this embodiment, when the current temperature of the battery and the percentage of charge of the battery (the SOC of the battery) are obtained in step S01, the pre-established battery characteristic relationship table is queried to obtain the internal resistance value of the battery corresponding to the current temperature of the battery and the SOC of the battery.
Step S03: and calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule.
Specifically, in this embodiment, after the internal resistance value of the battery is obtained in step S02, the charge cut-off voltage of the battery is calculated according to the internal resistance of the battery, the charging current of the battery, and the preset charge limiting voltage and according to the preset calculation rule. Wherein the preset charging limit voltage of the battery is an initial charging cut-off voltage V0，V0Is set to the nominal charge limit voltage noted on the battery case; in this embodiment, the preset calculation rule is as follows:
V1＝V0+I×Rbat
wherein, V1For charging the battery to a voltage, V0Is a predetermined charge limit voltage (i.e., the initial charge cutoff voltage V)0I.e. as indicated on the battery casingRated charge limit voltage) of the battery, I is the charging current of the battery, RbatIs the internal resistance of the battery.
Step S04: charging the battery according to the charging cutoff voltage;
in this embodiment, when the charge cut-off voltage V of the battery is obtained by calculation in step S031Then, according to the charging cut-off voltage V1The battery is charged.
Step S05: and when the electric quantity percentage of the battery is changed in a preset time period, turning to the previous step.
Specifically, in this embodiment, the preset time period is 10 seconds, that is, the percentage of charge of the battery is determined every 10 seconds, when the percentage of charge of the battery changes within the preset time period, the current temperature of the battery and the percentage of charge of the battery are obtained again as described in the step S01, the internal resistance of the battery is obtained again as described in the step S02, the charge cutoff voltage of the battery is calculated again as described in the step S03, and the battery is charged according to the charge cutoff voltage obtained by the calculation.
In the battery charging method provided by this embodiment, first, the current temperature of the battery and the percentage of the electric quantity of the battery are obtained; then, according to the current temperature of the battery and the electric quantity percentage of the battery, inquiring a pre-established battery characteristic relation table to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery; then, calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule; then, charging the battery according to the charge cutoff voltage; and finally, when the electric quantity percentage of the battery changes within a preset time period, re-acquiring the current temperature of the battery, the electric quantity percentage of the battery and the internal resistance of the battery according to the steps, re-calculating the charging cut-off voltage of the battery, and then charging the battery according to the re-calculated charging cut-off voltage. According to the battery charging method, on the premise of ensuring the safety of the battery, the charging speed of the battery is increased, and meanwhile, the available capacity of the battery is also increased.
Referring to fig. 2, fig. 2 is a schematic flow chart of another embodiment of the battery charging method of the present invention.
The present embodiment further includes the following steps before step S01 in the above embodiment:
step S00: measuring the internal resistance of the battery at different temperatures and different electric quantity percentages, and establishing a battery characteristic relation table of the battery temperature, the battery electric quantity percentage and the battery internal resistance according to the measurement result;
specifically, in this embodiment, before obtaining the current temperature of the battery and the percentage of charge of the battery, the parameters of the battery need to be measured, where the measured parameters include the temperature (T) of the battery, the percentage of charge (SOC) of the battery, and the internal resistance (R) of the battery at different temperatures (T) and different percentages of charge (SOC)bat) (ii) a Then, the temperature (T) of the battery, the percentage of charge (SOC) of the battery, and the internal resistance (R) of the battery are measuredbat) Establishing battery temperature (T), battery state of charge percentage (SOC) and battery internal resistance (R)bat) The battery characteristic relationship table of (2) is shown in table 1 (in this example, table 1 lists only the internal resistances of the batteries corresponding to the SOC values of 90 to 100 at a temperature of 25 ℃).
TABLE 1
| T(℃) | SOC | Rbat(Ω) |
| 25 | 100 | 0.11000 |
| 25 | 99 | 0.11075 |
| 25 | 98 | 0.11150 |
| 25 | 97 | 0.11155 |
| 25 | 96 | 0.11175 |
| 25 | 95 | 0.11250 |
| 25 | 94 | 0.11300 |
| 25 | 93 | 0.11375 |
| 25 | 92 | 0.11475 |
| 25 | 91 | 0.11625 |
| 25 | 90 | 0.11625 |
| … | … | … |
Further, the present embodiment further includes the following steps after step S04 in the above embodiment:
step S041: judging whether the electric quantity percentage of the battery changes within a preset time period;
specifically, when the percentage of the electric quantity of the battery changes within the preset time period, go to step S01; and when the percentage of the electric quantity of the battery is not changed in the preset time period, the step S042 is executed.
Step S042: when the electric quantity percentage of the battery is not changed within a preset time period and the charging current of the battery is lower than a preset charging cutoff current, ending charging;
specifically, in the present embodiment, when the percentage of charge (SOC) of the battery is not changed within the preset time period and the charging current of the battery is lower than the preset charging cutoff current, it indicates that the battery is fully charged, and the charging is ended. In this embodiment, the battery is a lithium battery.
In the battery charging method provided by this embodiment, first, a battery characteristic relation table is established; then, acquiring the current temperature of the battery and the electric quantity percentage of the battery; secondly, inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery; then, calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule; then, charging the battery according to the charging cut-off voltage; then, when the electric quantity percentage of the battery changes within a preset time period, the current temperature of the battery, the electric quantity percentage of the battery and the internal resistance of the battery are obtained again according to the steps, the charging cut-off voltage of the battery is calculated again, and then the battery is charged according to the charging cut-off voltage obtained by recalculation; and finally, finishing charging when the electric quantity percentage of the battery is not changed in a preset time period and the charging current of the battery is lower than a preset charging cutoff current. According to the battery charging method, on the premise of ensuring the safety of the battery, the charging speed of the battery is increased, and meanwhile, the available capacity of the battery is also increased.
The invention also provides a battery charging device.
Referring to fig. 3, fig. 3 is a block diagram of a battery charging apparatus according to an embodiment of the present invention.
In one embodiment, the battery charging apparatus 100 includes a temperature obtaining module 101, an electric quantity obtaining module 102, an internal resistance obtaining module 103, a charging cutoff voltage calculating module 104, a charging module 105, and an electric quantity determining module 106;
the temperature obtaining module 101 is configured to obtain a current temperature of the battery;
specifically, the present embodiment provides the battery charging apparatus 100, first, the temperature obtaining module 101 obtains the current temperature of the battery. The method for acquiring the current temperature of the battery by the temperature acquisition module 101 specifically includes: inputting a specified current I to an NTC thermistor (negative temperature coefficient) of the batteryntcAnd then measuring the voltage U across the NTC thermistorntcWill measure the voltage UntcDivided by the input specified current IntcObtaining the resistance value R of the NTC thermistorntc(Rntc＝Untc/Intc) Finally, the resistance R of the NTC thermistor is inquiredntcTemperature correspondence table (the correspondence table is the manufacturer of NTC thermistor)Established), the current temperature of the battery is obtained.
An electric quantity obtaining module 102, configured to obtain an electric quantity percentage of the battery;
specifically, the percentage of the battery capacity (also referred to as SOC, StateOfCharge, state of charge) acquired by the capacity acquisition module 102 ranges from 0 to 100. When the SOC value of the battery is 0, the available electric quantity of the battery is zero; when the SOC of the battery has a value of 100, it represents that the battery is fully charged. In practical applications, the electric quantity obtaining module 102 is an electric quantity meter in the charged object, and obtains the SOC value of the battery by using the electric quantity meter in the charged object.
The internal resistance acquisition module 103 is configured to query a pre-established battery characteristic relation table according to the current temperature of the battery and the percentage of electric quantity of the battery, and acquire an internal resistance of the battery corresponding to the current temperature of the battery and the percentage of electric quantity of the battery;
specifically, in this embodiment, after the temperature obtaining module 101 obtains the current temperature of the battery and the power obtaining module 102 obtains the power percentage (SOC) of the battery, a pre-established battery characteristic relation table is queried to obtain the internal resistance value of the battery corresponding to the current temperature of the battery and the SOC of the battery.
A charging cutoff voltage calculation module 104, configured to calculate, according to an internal resistance of the battery, a charging current, and a preset charging limit voltage, a charging cutoff voltage of the battery according to a preset calculation rule;
specifically, in this embodiment, after the internal resistance obtaining module 103 obtains the internal resistance value of the battery, the charging cutoff voltage calculating module 104 calculates and obtains the charging cutoff voltage of the battery according to the internal resistance of the battery, the charging current of the battery, and the preset charging limiting voltage according to the preset calculation rule. Wherein the preset charging limit voltage of the battery is an initial charging cut-off voltage V0，V0Is set to the value marked on the battery caseFixing a charging limit voltage; the preset calculation rule is as follows:
V1＝V0+I×Rbat
wherein, V1For charging the battery to a voltage, V0Is a predetermined charge limit voltage (i.e., the initial charge cutoff voltage V)0I.e. the nominal charge limit voltage indicated on the battery case), I is the charging current of the battery, RbatIs the internal resistance of the battery. In practical applications, the charging current I may be obtained by an analog-to-digital converter in a charging chip of the object to be charged.
A charging module 105, configured to charge the battery according to the charging cutoff voltage;
specifically, the charge cutoff voltage V of the battery is calculated and obtained at the charge cutoff voltage calculation module 1041Then, the charging module 105 stops to the voltage V according to the charging1And charging the battery.
And the electric quantity judging module 106 is configured to judge whether the electric quantity percentage of the battery changes within a preset time period.
Specifically, when the electric quantity determining module 106 determines that the electric quantity percentage of the battery (SOC of the battery) changes within a preset time period, the temperature obtaining module 101 obtains the current temperature of the battery again, the electric quantity obtaining module 102 obtains the electric quantity percentage of the battery again, then the internal resistance obtaining module 103 obtains the internal resistance of the battery again according to the obtained current temperature of the battery and the obtained electric quantity percentage of the battery again, then the charging cut-off voltage calculating module 104 calculates the charging cut-off voltage of the battery again according to the obtained internal resistance of the battery again and the preset calculation rule, and finally charges the battery according to the obtained charging cut-off voltage. In this embodiment, the battery is a lithium battery.
In the battery charging method provided by this embodiment, first, the temperature obtaining module obtains the current temperature of the battery, and the electric quantity obtaining module obtains the electric quantity percentage of the battery; then, the internal resistance acquisition module queries a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to acquire the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery; then, the charging cut-off voltage calculation module calculates and obtains the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and the preset calculation rule; then, the charging module charges the battery according to the charging cut-off voltage; and finally, when the electric quantity judging module judges that the electric quantity percentage of the battery changes within a preset time period, the temperature acquiring module acquires the current temperature of the battery again, the electric quantity acquiring module acquires the electric quantity percentage of the battery again, then the internal resistance acquiring module acquires the internal resistance of the battery again, then the charging cut-off voltage calculating module recalculates the charging cut-off voltage of the battery according to the internal resistance of the battery acquired again and the preset calculating rule, and finally the battery is charged according to the charging cut-off voltage obtained by recalculation. According to the battery charging method, on the premise of ensuring the safety of the battery, the charging speed of the battery is increased, and meanwhile, the available capacity of the battery is also increased.
Referring to fig. 4, fig. 4 is a block diagram of another embodiment of the battery charging apparatus according to the present invention.
The embodiment further includes a relation table establishing module 107, a storage module 108, a current detecting module 109 and a current determining module 110 based on the embodiment shown in fig. 3.
The relation table establishing module 107 is configured to measure internal resistances of the battery at different temperatures and at different power percentages, and establish a battery characteristic relation table of the battery temperature, the battery power percentage, and the battery internal resistance according to the measurement result;
specifically, in the embodiment, before the temperature obtaining module 101 obtains the current temperature of the battery and the power obtaining module 102 obtains the percentage of power (SOC) of the battery, the relation table establishing module 107 establishes the parameter of the batteryMeasurements are made, the measured parameters including the temperature (T) of the battery, the percentage of charge (SOC) of the battery, and the internal resistance (R) of the battery at different temperatures (T) and different percentages of charge (SOC)bat) (ii) a Then, the temperature (T) of the battery, the percentage of charge (SOC) of the battery, and the internal resistance (R) of the battery are measuredbat) Establishing battery temperature (T), battery state of charge percentage (SOC) and battery internal resistance (R)bat) The battery characteristic relationship table of (2) is shown in table 1 (in this example, table 1 lists only the internal resistances of the batteries corresponding to the SOC values of 90 to 100 at a temperature of 25 ℃).
A storage module 108, configured to store the battery characteristic relationship table established by the relationship table establishing module 107;
TABLE 1
| T(℃) | SOC | Rbat(Ω) |
| 25 | 100 | 0.11000 |
| 25 | 99 | 0.11075 |
| 25 | 98 | 0.11150 |
| 25 | 97 | 0.11155 |
| 25 | 96 | 0.11175 |
| 25 | 95 | 0.11250 |
| 25 | 94 | 0.11300 |
| 25 | 93 | 0.11375 |
| 25 | 92 | 0.11475 |
| 25 | 91 | 0.11625 |
| 25 | 90 | 0.11625 |
| … | … | … |
A current detection module 109 for detecting a charging current of the battery;
specifically, in the present embodiment, after the charging module 105 charges the battery according to the charging cutoff voltage, the current detection module 109 detects the charging current of the battery.
And a current determining module 110, configured to determine whether the charging current of the battery is lower than a preset charging cutoff current.
Specifically, when the electric quantity determining module 106 determines that the electric quantity percentage (SOC) of the battery does not change within the preset time period, the current determining module 110 compares and determines the charging current of the battery detected by the current detecting module 109 and the preset charging cutoff current, and when the current determining module 110 determines that the charging current of the battery is lower than the preset charging cutoff current, it indicates that the battery is fully charged, and the charging is ended. In this embodiment, the battery is a lithium battery.
In the battery charging method provided by this embodiment, first, the relationship table establishing module establishes a battery characteristic relationship table, and meanwhile, the storage module stores the battery characteristic relationship table; then, the temperature acquisition module acquires the current temperature of the battery, and the electric quantity acquisition module acquires the electric quantity percentage of the battery; then, the internal resistance acquisition module queries a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to acquire the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery; then, the charging cut-off voltage calculation module calculates and obtains the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and the preset calculation rule; then, the charging module charges the battery according to the charging cut-off voltage; then, when the electric quantity judging module judges that the electric quantity percentage of the battery changes within a preset time period, the temperature obtaining module obtains the current temperature of the battery again, the electric quantity obtaining module obtains the electric quantity percentage of the battery again, then, the internal resistance obtaining module obtains the internal resistance of the battery again, then, the charging cut-off voltage calculating module calculates the charging cut-off voltage of the battery again according to the internal resistance of the battery obtained again and the preset calculation rule, and finally, the battery is charged according to the charging cut-off voltage obtained by recalculation; when the electric quantity judging module judges that the electric quantity percentage of the battery does not change within a preset time period, the current detecting module detects the charging current of the battery, and when the current judging module judges that the charging current of the battery is lower than a preset charging cutoff current, the charging of the battery is finished. According to the battery charging method, on the premise of ensuring the safety of the battery, the charging speed of the battery is increased, and meanwhile, the available capacity of the battery is also increased.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of charging a battery, comprising the steps of:
acquiring the current temperature of the battery and the electric quantity percentage of the battery;
inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to obtain the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery;
calculating to obtain the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and a preset calculation rule;
charging the battery according to the charging cutoff voltage;
and when the electric quantity percentage of the battery is changed in a preset time period, turning to the previous step.
2. The battery charging method of claim 1, wherein the step of obtaining the current temperature of the battery and the percentage charge of the battery is preceded by the step of:
measuring the internal resistance of the battery at different temperatures and different electric quantity percentages, and establishing a battery characteristic relation table of the battery temperature, the battery electric quantity percentage and the battery internal resistance according to the measurement result.
3. The battery charging method of claim 2, wherein the step of charging the battery according to the charge cutoff voltage is further followed by:
and when the electric quantity percentage of the battery is not changed within a preset time period and the charging current of the battery is lower than a preset charging cutoff current, finishing charging.
4. The battery charging method according to claim 3, wherein the step of calculating the charge cutoff voltage of the battery according to the internal resistance of the battery, the charging current, and the preset charge limiting voltage according to the preset calculation rule specifically comprises:
according to the internal resistance, the charging current and the preset charging limiting voltage of the battery, according to a calculation rule: v1＝V0+I×RbatCalculating to obtain the charge cut-off voltage of the battery; wherein, V1For the charging to cut off to voltage, V0Is the preset charging limit voltage, I is the charging current, RbatIs the internal resistance.
5. The battery charging method according to claim 1, wherein the battery is a lithium battery.
6. A battery charging device is characterized by comprising a temperature acquisition module, an electric quantity acquisition module, an internal resistance acquisition module, a charging cutoff voltage calculation module, a charging module and an electric quantity judgment module; wherein,
the temperature acquisition module is used for acquiring the current temperature of the battery;
the electric quantity obtaining module is used for obtaining the electric quantity percentage of the battery;
the internal resistance acquisition module is used for inquiring a pre-established battery characteristic relation table according to the current temperature of the battery and the electric quantity percentage of the battery to acquire the internal resistance of the battery corresponding to the current temperature of the battery and the electric quantity percentage of the battery;
the charging cut-off voltage calculation module is used for calculating and obtaining the charging cut-off voltage of the battery according to the internal resistance, the charging current and the preset charging limiting voltage of the battery and the preset calculation rule;
the charging module is used for charging the battery according to the charging cut-off voltage;
and the electric quantity judging module is used for judging whether the electric quantity percentage of the battery changes within a preset time period.
7. The battery charging apparatus of claim 6, further comprising a relational table establishing module; and the relation table establishing module is used for measuring the internal resistance of the battery at different temperatures and different electric quantity percentages and establishing a battery characteristic relation table of the battery temperature, the battery electric quantity percentage and the battery internal resistance according to the measurement result.
8. The battery charging apparatus according to claim 7, further comprising a current detection module and a current determination module; wherein,
the current detection module is used for detecting the charging current of the battery;
and the current judgment module is used for judging whether the charging current of the battery is lower than a preset charging cutoff current.
9. The battery charging apparatus of claim 8, wherein the charge cutoff voltage calculation module is specifically configured to:
according to the internal resistance, the charging current and the preset charging limiting voltage of the battery, according to a calculation rule: v1＝V0+I×RbatCalculating to obtain the charge cut-off voltage of the battery;
wherein, V1For the charging to cut off to voltage, V0Is the preset charging limit voltage, I is the charging current, RbatIs the internal resistance.
10. The battery charging apparatus of claim 6, wherein the battery is a lithium battery.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410298572.2A CN105207281A (en) | 2014-06-26 | 2014-06-26 | Battery charging method and device |
| PCT/CN2014/084118 WO2015196535A1 (en) | 2014-06-26 | 2014-08-11 | Battery charging method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410298572.2A CN105207281A (en) | 2014-06-26 | 2014-06-26 | Battery charging method and device |
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| CN105207281A true CN105207281A (en) | 2015-12-30 |
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| WO (1) | WO2015196535A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958603A (en) * | 2016-07-01 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Battery charging method and device |
| CN106655398A (en) * | 2017-01-13 | 2017-05-10 | 广东欧珀移动通信有限公司 | Charging control method, device and terminal |
| CN108051746A (en) * | 2017-11-02 | 2018-05-18 | 福建联迪商用设备有限公司 | A kind of determination methods and terminal of battery normal power supply |
| WO2018129977A1 (en) * | 2017-01-13 | 2018-07-19 | 广东欧珀移动通信有限公司 | Charging control method and apparatus, storage medium, and computer device |
| CN108886177A (en) * | 2016-03-31 | 2018-11-23 | 西门子移动有限公司 | Method and device for charging a battery |
| CN109860743A (en) * | 2018-11-14 | 2019-06-07 | 维沃移动通信有限公司 | A kind of charging method and terminal device |
| CN110635186A (en) * | 2019-08-29 | 2019-12-31 | 华为技术有限公司 | A charging method and electronic device |
| WO2025086821A1 (en) * | 2023-10-27 | 2025-05-01 | 宁德时代新能源科技股份有限公司 | Charging method and apparatus, charging management device, and computer readable storage medium |
| WO2025145928A1 (en) * | 2024-01-03 | 2025-07-10 | 荣耀终端股份有限公司 | Charging management method, storage medium, electronic device and program product |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108448694B (en) * | 2018-03-29 | 2020-12-25 | 北京小米移动软件有限公司 | Wireless charging equipment, method and device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1845418A (en) * | 2006-04-11 | 2006-10-11 | 广州市番禺丰江电池制造有限公司 | Quick charge method and device |
| CN101208847A (en) * | 2005-06-30 | 2008-06-25 | Lg化学株式会社 | Method and device for estimating battery state of health |
| CN103259305A (en) * | 2013-04-03 | 2013-08-21 | 临清市供电公司 | Direct-current power source intelligent charging control method based on lithium battery |
| CN103576091A (en) * | 2012-07-19 | 2014-02-12 | 鸿富锦精密工业（深圳）有限公司 | Cell open-circuit voltage compensation system and cell open-circuit voltage compensation method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3884802B2 (en) * | 1996-11-07 | 2007-02-21 | 日産自動車株式会社 | Lithium-ion battery charging method |
| JP3964635B2 (en) * | 2001-06-20 | 2007-08-22 | 松下電器産業株式会社 | Memory effect detection method and solution |
| CN1955752B (en) * | 2005-10-24 | 2011-03-16 | 中兴通讯股份有限公司 | Method for monitoring charging process of battery of mobile terminal |
| JP4703593B2 (en) * | 2007-03-23 | 2011-06-15 | 株式会社豊田中央研究所 | Secondary battery state estimation device |
-
2014
- 2014-06-26 CN CN201410298572.2A patent/CN105207281A/en not_active Withdrawn
- 2014-08-11 WO PCT/CN2014/084118 patent/WO2015196535A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208847A (en) * | 2005-06-30 | 2008-06-25 | Lg化学株式会社 | Method and device for estimating battery state of health |
| CN1845418A (en) * | 2006-04-11 | 2006-10-11 | 广州市番禺丰江电池制造有限公司 | Quick charge method and device |
| CN103576091A (en) * | 2012-07-19 | 2014-02-12 | 鸿富锦精密工业（深圳）有限公司 | Cell open-circuit voltage compensation system and cell open-circuit voltage compensation method |
| CN103259305A (en) * | 2013-04-03 | 2013-08-21 | 临清市供电公司 | Direct-current power source intelligent charging control method based on lithium battery |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108886177A (en) * | 2016-03-31 | 2018-11-23 | 西门子移动有限公司 | Method and device for charging a battery |
| CN105958603A (en) * | 2016-07-01 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Battery charging method and device |
| CN105958603B (en) * | 2016-07-01 | 2018-10-26 | 宁德时代新能源科技股份有限公司 | Battery charging method and device |
| WO2018129977A1 (en) * | 2017-01-13 | 2018-07-19 | 广东欧珀移动通信有限公司 | Charging control method and apparatus, storage medium, and computer device |
| WO2018129991A1 (en) * | 2017-01-13 | 2018-07-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, charging device and terminal |
| CN106655398A (en) * | 2017-01-13 | 2017-05-10 | 广东欧珀移动通信有限公司 | Charging control method, device and terminal |
| US10720791B2 (en) | 2017-01-13 | 2020-07-21 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, charging device and terminal |
| CN108051746A (en) * | 2017-11-02 | 2018-05-18 | 福建联迪商用设备有限公司 | A kind of determination methods and terminal of battery normal power supply |
| CN109860743A (en) * | 2018-11-14 | 2019-06-07 | 维沃移动通信有限公司 | A kind of charging method and terminal device |
| CN110635186A (en) * | 2019-08-29 | 2019-12-31 | 华为技术有限公司 | A charging method and electronic device |
| CN110635186B (en) * | 2019-08-29 | 2021-06-01 | 华为技术有限公司 | A charging method and electronic device |
| WO2025086821A1 (en) * | 2023-10-27 | 2025-05-01 | 宁德时代新能源科技股份有限公司 | Charging method and apparatus, charging management device, and computer readable storage medium |
| WO2025145928A1 (en) * | 2024-01-03 | 2025-07-10 | 荣耀终端股份有限公司 | Charging management method, storage medium, electronic device and program product |
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